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10 cities that define 'Dirt Poor'

Baghdad is considered the worst place to live, according to Mercer's latest quality of living survey

For the 19th year, Mercer, the world's largest human resources consulting firm, has released its quality of living rankings. Vienna, Austria's capital on the Danube river, took first place, while Baghdad is again considered the worst place to live. Take a look at ten least liveable cities on Earth.